부산대학교 도서관

A method for determining a threshold write-in power of a compact disc (CD) includes the following steps: (a) recording M test data into M sectors of an outer area of the CD with a pickup by emitting laser beams of a variety of distinct test powers, (b) reading the test data with the pickup and calculating corresponding error rates of the test data, and (c) comparing the M test powers and calculating the threshold write-in power, which is between an upper-bound test power and a lower-bound test power.